This will depend on the specialty, level of the students, availability of journals, the course requirements. For example in research course, it will be necessary. In other courses, evidence-based learning is essential these days.
In philosophy and religion, undergraduates writing their senior theses, masters, and doctoral students read journals in the field. Masters and doctoral students read with a much greater frequency than undergraduate seniors.
In Indian context the response is not that encouraging and to inculcate the habit of journal reading among budding researchers, teachers somewhere have to play a much greater role in directing students and scholars to these primary sources of research information.
It depends on the students nature. If he/she like reading, h/she keep searching to find a copy. I remember myself when I was a student even before college. I was waiting my father eagerly to finish reading to receive it from him.
According to my experience, very little voluntary. To make them read academic articles I give them list of couple of them which cover lecture content and if they provide quality discussion they earn extra points for the final grade. Some of them take the opportunity.